90Y Liver Radioembolization Imaging Using Amplitude-Based Gated PET/CT.

Area of Science:

• Nuclear Medicine
• Medical Imaging
• Oncology

Background:

• Positron Emission Tomography/Computed Tomography (PET/CT) is increasingly used for monitoring hepatocellular carcinoma (HCC) after Yttrium-90 (Y) radioembolization.
• Poor image quality due to low count efficiency and respiratory motion challenges accurate assessment.
• Gating techniques can correct motion but may increase image noise.

Observation:

• Amplitude-based gating, previously successful in Fluorodeoxyglucose (FDG) PET, was applied to Y liver imaging.
• This technique was evaluated in patients undergoing Y radioembolization for HCC.

Findings:

• Amplitude-based gating successfully provided motion-corrected Y PET/CT images.
• The technique resulted in higher estimates of Yttrium-90 activity concentration compared to uncorrected images.
• This suggests improved quantification and potential for better dosimetry.

Implications:

• Amplitude-based gating is a viable method for improving Y PET/CT liver imaging in HCC patients.
• Enhanced image quality and quantification may lead to more accurate post-therapy dosimetry.
• This could optimize radioembolization treatment planning and patient management.